Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eef4a26986eb9d9…

MALICIOUS

PDF

39.5 KB Created: 2020-08-25 03:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f1c47b7d9c98f46860d86e7f37aa70e SHA-1: 7c2269d60d2f146282ada7e975817a6940c19253 SHA-256: 6eef4a26986eb9d99c2880458c5ddca734f8dd21a43bccf34c3c6065dd645e0a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and several other URLs hosted on shopify.com and a suspicious domain. This suggests an attempt to lure users to malicious infrastructure, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=ohio+guidestone+medina+oh
    • http://nusij.rejuvenatemedical.co.uk/uploads/1/3/0/8/130813846/lugerepegev_fojiriveji_xoxadesufejak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/12318886635.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/pegufeladuzumofeme.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/xazuposelapugebi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/kesidifepat.pdf
    • https://cdn.shopify.com/s/files/1/0459/6033/1423/files/bryson_tiller_patient.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/koxole.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/mouse_brain_atlas_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/kusogaluvoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4917/files/coloring_animals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/juzapuwomonitogapa.pdf
    • https://cdn.shopify.com/s/files/1/0449/6248/0296/files/69903426452.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c97.bin
02d22cf61bda0eef4d7a0dd29b2d58df143fdf7d1ea78e3fda482b0ccf0b11fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C97 5140 bytes
font_01_sfnt_off00006de5.bin
939ad323b1bf566a22e2ee45634568d6c159a7fd4f0ad737922ea820c9c773c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE5 10424 bytes